Oyster dredging and manipulating machine.



WITNESSES:

' N. A. LYBEGK.

oYsTER DRBDGING AND'MANIPULATING MACHINE.

PPPPPPPPPPPPPPPPP zo. 222222 9, n A 991,333. Patented May 2,1911. y 9 EEEEE s-snmg'r 2.

www '1 I. Lllv'fl'l APPLICATION FILED D}l(}.24,1909.

Patented May 2, 1911.

9 EERSTE-SHEET 3.

/f MM. m 1 1 1 T// N 1 1 m 1 1. 7 j l E, A 1 rw y W o. B

5 Sw @VD 1 11 .lrlVQ- 1 1 -w3 3 3 N131. 1 .Q SW. 1 mm. 1 h l .K .w mv u* S1 1 w 1 m 1 11 1 M mE 1 N. A. LYBECK. OYSTER DREDGING AND MANIPULATING MACHINE. APPLICATION FILED 13110.24, 1909.

` Patented May 2, 1911.

9 BEEETB-BHEET 4.

www WHIH WTNESSES: Y :a INVENTOH f 1 .fm Mimi N. A.4 LYBBCK.-

OYSTBR DRBDGING AND MANIPULATING MACHINE.

APPLICATION mum m10. 24, 1909.

Patented May 2, 1911. 9 SHEETS-SHEET 5.

v By :Eatm 1 ATTORNEYS Patented May 2, 1911.

WITNESSES:

ATTUHNEYS N. A. LYBECIL oYsTBR DRBDGING AND-MANIPULATING MACHINE.

APPLIATION FILED DEC.24,1909. Y 991,333. y. I l Patented May 2, 1911.1

ATTORNEYS N. A. LYBECK.

OYSTER DRBDGING AND MANIPULAI'ING MAGHINE.

APPLICATION FILED DEQ-24,1909, v

' Patented May 2, 1911.

9 SHEETS-SHEET B.

N. A. LYBECK. OYSTER DRBDGING AND MANIPULATING MACHINE.

APPLICATION FILED DIBG.Z4,19094 Patented May 2, 1911.

9 SHEETS-SHEET 9y mw M3 mu um mw u wirr/5385s Y 1 ,4TTOHNEYS NELS A. L'YBECK, 0F HUG ISLAND, RHODE ISLAND.

OYSTEB 'DBEDGING AND. J:N1ANIIPUIATING MACHINE.

Bpecloation'rot Letters Patent.

Patented May-2, y1911.

l V Application led December, 1909. Serial No. 634,752.

To 4all whom 'it may concern: 1

Be it known that I, Nans A. LYBEcK, a citizen of the United States, and a resldent of Hog Island, in the county of Bristol'and 5 State of `Rhode Island, have inventeda new and Im roved Oyster Dredgin and Manipulating' achine, of which the llowing'y is a full, clear, and exact description. L

Among the principal objects whichthe present invention has 1n view are to provide means whereby oysters may be elevated from lthe bed, inspected, and after having had the predatory foes detached therefrom, 'transplanted; to provide meanswhereby the oysand transplanted with reference to the sorting; to provide meanszwhereby the foes of the oyster may be' captured andexterminated; Vto rovide means for clearing,fcu1 ti vating an levelin the oyster bed' to provide a mechanism 01` performing the above mentionled'functions whereby may be am# plified the working capacity offthelabor employed ,in theitendirig'and care' of the oysters and oyster beds-v to, provide means automatic in .character l for distributin the loihasand when received inthe dre ging ma ine; to provide means ,for automatically delinering the load from the dredger to con'- veyingvessels held in o erativeV relation to the said dredger; to provlde means for turn- .in the dredging machine upon a selfcon` tainedI center; provide' a 4construction of an oyster scoop and devices attached thereto which is constructed to-ride upon the'oyster bed; and to provide .-tools, accessoriesand V.operative arts incorporated in andforming p art'fof tje dredging machine, which .are` ra-ble in construction' operation; and to provide acontinuousp'simple, eliicient and.- l an system for distributingoysters and shells from the initialI operation'of removal from and to the return-to the ""5' One embodiment fof the present-invention 451is disclosed in the; structure illustrated in the accompanyin p characters of re erence denote correspond- 'ingrparts' in 'all the,views',3 tnd which-- y lgure 1 is a fragmentar VvieW-in side ele@ 'vation, of thel forwarding f offadredgi'ng machine constructed in -iqiformity with the' present invention; Fig.' 2 is a Vfragxfn'erxtar'yview in side (elevation, showing acontinuaf. .tion ofthe view. rillli'strated in Fig; 1, `tol' '55 geth'er with a transportation olf- 1' htgesecw used in connectionjwith the dre 'mav ters may be elevated from the bed, sorted,

, detail viewin plan,;illustrating the construc- `log-5, of ,the construction illustrated in xmachine. :The stanchl'ons 34, 34 are joirine by stringers' 35, 35, which are extended forel drawings, in'l 'which4 like chinegFig. 3 is a fragmentary View in plan," of'the part ofthe machine .as illustrated in Fig. 1; Fig. 4 is a fragmentary View, showing in plan the .portion of the construction .60 illustrated in Fllig. 2; Fig. 5 is a fragmentary vievgr in vertice' central lon itudina section, of the portion oi."` themachine illustrated in Fig. 3; Fig. 6 is a fragmentary viewvin vertical central'longitudinal section, of the rear end of 'the' dredging machine, the li hter scow being detached; Fig. 7 is a rear en elevation of the dredging machine, slightly en larged in scale; Fig. 8 1s a cross sect1-on of the machine, taken on the line 8 8 in Fig. 4; Fig. 9 is a cross section of th'e machine, taken on the line 9'--9 in Fig. 4; Fi 10 is a detail i view on an enlarged scale an in side elevation, illustrating the mounting of the short conveyers and scoops for delivering the material from one to the other of the short sections, and delivering the same laterally; Fig. 11 is a detail View in plan, yof the construction illustrated in Fig. 10; Fig.` 12 is a -tion of the scoop having the reel attachment; Fig.' 13 is a vertical section taken on the `line or hull 31. The forward end of the hull is divided, forming a4 passage in which an elevator frame 32 1s permitted to rise an'd Jfall.

The elevator 32 is pivoted atv 80 upon vertical stanchions 34 134 fixedly mounted upon -the hull 3l and iorming 'part .of the4 dre ward along the: edge of the passage formed,

house 36 isV erected. Between the stanchions, 34, 34and theframingi f0rmed..the1eby.'. alre extended'the various 'f-"sliaftsjformng the pivotal mounting for ,the conveyers cmq 10o plo'yed in delivering; oysterstheir -foes or debris Ywhen'the "same, are raised by thesaid elevator 32.

and .low he fadva ed end means-of'a-able'. y' i anchored fijo a bail 88,4 ivoted at 44 tojthej elevator frame. The ca 1e; 37 isireeved oven: 'V

-sheavesf39' 40and 41-imd 4,utpon jwinch 42; v- .managen-42j.; hand-'o ,a`crankhandle'43- (see ig. 3 0 thedrawf' the usual course of operation the for thefelevator 32, andupon which a pilot 'atbr 32 isV manipulated c e cab1e 3 7 is'securelil Q cable 37 is slack so that the lower end of the elevator 32 and the scoop connected therewith are at liberty to rise and fall to accommodate the irregularities of the oyster bed. Secured at the same pivotal connection 44 is a second bail 45, to which is anchored a balancing cable 46. The cable 46 is extended over sheaves 47 and 48. At the opposite end of the cable 46 is secured a weight box 49, in .which are' placed, as desired, balancing weights 50, 50. The cable 46 is anchored to the box 49 by means of an eye-bolt 51 secured at the top of the said box. By means of this arrangement the elevator 32 may be so finely balanced that the end will lift easily when t e scoop is thrown to the positio'n to override an obstruction on the bed.

' The sheaves 39, 40 and .41 are mounted upon shafts which are extended between, or secured upon, xed framing booms 52, '52

'and 53, 53. The framing booms 52, 52 are connected at the forward end by a cross beam 54. The framin booms 53, 53 are vconnected across the en by a cross beam 55. On the beam 55, is formed a-saddle 56. A

similar cross beam saddle 57 is extended between the long upright stanchions 34, 34 supporting the pilot house 36. At the rear of the dredging machine and between the rearmost stanchions 34 thereof, is extended a cross framing beamv 58. In the framing beamsV 54 and 58 are provided eye bolts 59, 59, between which are reeved and secured a series of guy lines 60, 60. The guy lines 60, 60 rest upon the said saddles 56 and 57, and

form a truss-like and stiffened construction.

l for the dredging machine and for the opervator 32.

' 65, 65 are provided to carrythe scoop and E be 'in ating mechanism manipula-ting the ele- Pivotelly mounted upon a shaft 61.are `the several alternative dev1ces employed -in the collection of the oysters and in the preparati'on of the bed therefor. The gathering scoo lshown particularly in Figs. 1, 5 and 13 .the drawings, embodies a floor and side pieces 62, 62 connected by an inclined body rtion 63 forming the bottom ofthe scoop.

xtended between the side -shafts 64, 64; .It is upon t e shafts 64, 64 that rollers 65, 65 Vare mounted. The rollers prevent the samefrom becoming jammed or otherwise held in the bed Hoor, therebyv blocking the machine, causing the b of theelevator or parts connected therewith.4

Pivqtally mounted on a'shaft 66, extended between the sides 62, 62, is va reel the free arms 67, 67 whereof are connected by paddles 67l and cross rods A68, 68, which are xedly secured to annular rings 69, 69.. The arms 67, 67 are extended from a hub 70;and are heldV in extended` 'tion thereon bye free ends of the arms 6 7 are unconnected and are-spaced to relation sufliciently close to -sion tothe 'the'gear 74 1s any suitable orm of sproc et The sprocket wheel 76 is, by e means of a sprocket chain 77, geared with a 'eces 62, 62 arethe s ald bottom, and therefrom t'o'ssing the' oysters or. other article upon the conveyer 71,I which is mounted on the elevator 32.

The shaft 66 is mounted in suitable elongated slots 72 formed in the sides 62, V62. The slots 72 thusformed are concentric with the center of an axle 73. The axle 73 forms a bearing for a gear wheel 74, which is meshed with a gearwheel 7 5 fixed-on the end of the shaft 61. By means of the intermeshing of the gears 74 and 75 the rotary direction of the shaft 61' is reversed in transmisar 74. Fixedl mounted u on wheel 76.

s rocket'wheel 7 8, xedly mounted upon the s aft 66. By lmeans of this earthe rotary directionof the gearl 4 is imparted t the shaft 66 `and the reelembodying the arms 67'. The motion thus imparted to the reel and thearms 67 thereof is such that the oysters, or loose objects on the oyster bed are drawn backward and tossed upward on to the inclined bottom "63 and upon the apron of the conveyer 71. The conveyer 71 is a flexible belt, constructed in detail as'hereinafterdescribed, whichvextends over 'a driv` ing drum 79, the said drum having any suitable form of construction whereby the conveyer belt, as constructed, would be driven. The drum 79 is provided with a shaft 80, driven in the direction shown by the arrows in Fig.. 5 of the drawings. It will beseen that the conveyer 71, when traveling as indicat'ed by the'arrows, rotates the shaft61 and the gear 75 connected therewith in such wise as to cause, throu hthe gears 74 and 78 -arotative direction-o the reel and larms 67 thereof as' illustrated by the arrow in 5. As stated, #this reversion of .the. rotative travel of theshafts .61 and 66 results in the transference of loose ob`ects, sch as oysters, star fish 'and similar ob] ccts, upon the upper side of the conveyer 71, to be carried thereby over the drum 79 atthe upper end of the said oonveyer;

'. The elevator 32 is at an ang-fle substantially as shown in Figs. 1 and 5-of the drawings. The upper end,- where the same asses over the drum 7 9, is arranged toI verang the upper edge of a slightly inclined tray 82. The'ltray 82, as' shown 1n plan in 3 of the drawings, is rovided w1th. a sries of openings or per orations 83 83. The openings 83 are formed suiciently large t'o pass all objects under a defimte The tra is inclined, as shown in 5, of the drawmgs,-and

is hung in such-posl- ,l as

' slides. f 103 is employed only w en .the oysters conlthat as the s tivel whic -is fixedly mounted upon a driving ,shaft 92 of the general driving mechanism.

i ered `is inclined,as-fshown in Fig. 6 of the drawwhere it is' suspende senses tion by means of hanging hooks 84, 84 and a rotary shaft 85, see Figs.` 5 and 9. Upon the rotary shaft 85`fis mounted a drum 86 which isprovided witha cam-shaped groove 88 which en a es a pin 87 in such manner at 8 5 is rotatedthe tray 82 is vibrated laterally and ra idly.

The shaft 85 ls-,provi ed with a sprocket wheel 89, which isfdriven by a f sprocket chain 90. The-sprocket chain 90 is operaconnected with a sprocket wheel 91,

F rom the tray 82 the oysters and star fis-h too large to pass the openings 83 are delivupon a conveyer 93. The conveyer 93 ings, and the end thereof `is extendedover theend of a. conveyer 94. The conveyer 94 is disposed in a substantially horizontal p0- sition, as seen in Fi 2 of the'drawings,

porting cable '95, which is anchored by means of a bail 96 to the said conveyer 94. The conveyer 94 is pivotally mounted at 97 -in thestanchions 34. Upon the stringers `35 aremounted drums 98, the shaft of which is pivoted in bearings 99 `andis connected by a chainl99 .toil a shaft Ahaving a crankr handle 100. The cables 95 are-reeved over sheaves 101, 101', which are pivotally secured in bear-` ings formedon masts 102, 102, Ierected upon the framing beam 58. (See Fig. 2 yof the drawings.) lThe conveyer 94 constitutes the apron or delivery medium whereby the selected'and` clean oysters are delivered to the lighter scow 103, or delivered to the sea, as

t-he case may be.

By'reason of itsI substanl tlally horlzontal dispositionan operator or mechanic statio-nedinear the inner end of said conveyer, may pickifroiii the material as delivered u on the said conveyer the star f fish or other oreign substances which have failed to pass ,through the openings 83 in the tray 82. i I y Anyy `desired orsuitable form 'of lighter scow ma be used; that shown in the draw- Y lngs d1 ers from the usual construction in that a superstructure of bins 104 is provided. The bins 104 are of the usual hopper form,'.but are provided'at diferentsstationsV within their longitudinal extensions iwith slides 105, 105. The slides 105 are slidably held in rabbetedframes 106, 106. The converged lower portion of the bin 104 is disposed directlyabove a conyyer` belt 107. The belt 107`is mounted upon rotary drums 108 dis` posed at Ieach end of the lighter or scow. ByA

means of the slides 105 the bins 104,;may be unloaded adually by withdrawing the said T e unloading l rocess'bf the scow drums 108 is operatively vconnected with the.

by means of a supis a sprocket W A conveyer of necessary or desired length, is so dis sed that it may be extended below the de ivery end of the conveyer belt 107 on the scow 103. At the opposite end the conveyer Vis disposed in such manner as to deliver the oysters as received, upon a `series "of short conve ers. Each of the short conveyers is incline as seen in Fig. l0. Under the raised endV of each of the Vsaidconvleyers is a chute for delivering the oysters laterally from the`said conveyers, as will be hereinafter more particularlydescribed. A

The motor power employed for propelling the dredging machineand the hul 31 thereof' may7 be suitedto' the needs and desires of the owner or operator. In the drawings is shown` an internal combustion. engine 111 mounted upon sills` 112, 112- and having crank connection with a propeller shaft 114. At the outer end of the propeller shaft 114 is xedly attached -a propeller 115. The ends of the hull 31 are given am overhang, asseen in Fi 2 and 7 of thedrawings. The hull isdivided into three sections by means of keels 116, 116. Mounted upon the ends` `of shafts 117, 117 Vare small paddle wheels 118, 118.f The paddle wheels 118 are disposed substantially as shown in Fig. 7 of the drawings so that the grip of the blades thereof upon the water is suchjas to shift the rear of the hull laterally in either direction according'as the said shafts 117 be revolved. The shafts 117fmay b e connected in any suitable manner with thel main drivin shaft ofthe motor 111. Thefshafts 117-11 are driven by separate motors. One of said ,shafts is connected with a `shaft 122 dis- "posed above the deck of the vessel and op.

eratively connected therewith by means of the transmission sprocket chain 121. The' ychain 121 is mounted on the sprocket wheels 120 and 123. 'This construction is best shown in Fig...-8 of drawings. The wheels 120 iii each instance are loosely mounted upon 'the shafts 117, to be fixedly held thereon by any .suitable clutch mechanism'with which the said shafts mayv be i provided. One of the shafts 117 is,` employed as a shaft whereby the transmission `1s vthrough a sprocket chain 121 'to a shaft 122 above thedeck of the hull 31. The shaft 122 has Iat the end' and in 'engagement with4 the 'sprocket4 chain' 121," a sprocket wheel 123, while atthe other 'end is ixedlyf-,mounted a miter 124"is/=fmeshed with mate ears "125 and 126U 'operating'a shaft 127 an the shaft 92 in relatively opposite rotaryrdirections. Upon the shaft 92, as before stated, is fixedly` sprocket chain 90-and the` tray 82'connected t erewith are operated. Upon the'shaft 92 eel 128, which,isconnected by means of a chain 129I with-1a' second gear 124. The gear A' Vmounted the sprocket wheel 91, whereby the ein sprocket wheel 130. The sprocket` wheel 130 is xedly mounted u on a shaft 131, on which a drum 132 o the conveyer 93 is mounted. The shaft 131 and a shaft 133 are connected'by means of a chain 134, thus imparting a driving action to a conveyer 135 similar to that imparted to the conveyer 93.

Above described has been the construction 'and arrangement of the conveyer 71, the tray 82, the conveyer 93 andthe eonveyer 94,

, whereby the selected oysters, and the star fish too. large to pass through the openings 83, have been conveyed. The operation of the conveyer 135 and theA lateral conveyers connected in series therewith, is such as to provide for the handling of the dwarf oysters, broken shells, small borers and star fish, or other refuse raised from the oyster bed. For the above purpose the lower end ofthe conveyer 135 1s extended below;T the tray 82 and to the rear 'vend thereof.

The conveyer 135 operates to-deliv'er its load upon'a doubly inclined saddle 136. The wings of the saddle 13G are pivoted at 137. When both wingsare depressed; as seen in Fig. 8 of the drawings, -the material deliv- `ered by the conveyer 135 vis distributed V'equall to laterally extended conveyers 138',

138. he conveyers 138 are provided with meshed gears 139. By the intermeshed gears 139, the conveyers 138 are driven in opposite directions, and these outwardly.

' ing chutes of -a length suicient to introduce The outer `and upper ends of the conveyers 138, 138 are'extended above the short conveyers 140, 140. The conveyers 140 are arranged in series.V The conveyers are mountedon rotary shafts and drums formed thereon, and disposed so that they overlap, each of the said con'veyers being 'disposed to deliver its load on the upper surface of the next succeeding eonveyer. Extended beside t-he conveyers 140, 140 are trough-'like bins 141,141. The bins 141 and the conveyers 140 are mounted upon-platforms 142, 142, supported from the side of the hull 31 by means of out-rigging brackets 143, 143.

'Suitably suspended Aupon the frame Work supporting the eonveyers 140, 140 are deflectthematerial when `received thereby into the bins 141, 141. By the interposition of any one or more of thewsaid short chutes the product of the articular short convyer 140, Y

arranged to de iver thereto, is carried to the bin 141 to which it pertains. By the elimina-` tion of any Vor all ofthe. said short chutes,

- each of the said short conveyers is permitted todeliver its load upon the lower or tail end .of the next succeeding short conveyer, lto be povided.

transferred by it to the short chute at' the delivery end thereof, or to transferred to the `next 'succeeding s ort chute. Bymeans 'of this arrangementI of `conveyers in series, the material Vdelivered by the conveyers to the binsv 141,141 is distributed evenly. The sides of the bins 141, 141 are converged, and the bottoms thereof are provided with a series of slides 144, 144, resembling in construction and arrangement the slides formed in the bins 104, illustrated :1s-attached to the scow 103. Extended longitudinally under the bins 141, 141 are horiaonta-lly disposed conveyers v145, 145. The conveyers 145, 145 are driven by means ofthe transmission mechanism abover described,

to which theyk are connected through chains 146, 146. It will be understood thatv the `drums and shafts carried thereby, for supporting the various short length-conveyors.

140,are operatively connected by means of sprocket chains,l whereby the travel of all of the conveyers is accelerated.

The bins 141,141 are provided for the Y reception of the refuse and. the predatory foes to thev oysters.` As stated, these consist largely of the star fshand the`borers. A large percentage of the star sh aresmall enough to pass through the openings 83 provided` in the tray 82. vAll-of the borers are sufficiently small to pass through the said openings. But as certain of the oysters raised by the elevator 32 are suiliciently small to also pass the said openings, it is wise to sort the contents of the bins 141, and for this urposethe load therein is light, and distrib the short chutes and the short conveyers 140. When the sorting has been carried forward to a point where the oysters have been removed from vthe refuse and foes, theyare.

placed with the other oysters on the conveyer 94, or placed back into the sea, as the. Acustom or desire dictates. In the operation' of the machine, and following the system employed thereby, the dredging machme is con-V stantly atyseasor at. work, therefore it becomes necessary to discharge the bins 141 into suitable scows or lighters for distribu' tion to the shore, where the said foes and refuse are buried or distributed and thus destroyed.l It is for this purpose that the conveyers 145 are. employ uted by means of the manipulation of ilo . 1t is deemed convenient to' operate the Y dredging machine in 'such manner that it ma be swung upon a self-contained center. It 1s for this purpose that the hull 31 is provided with the paddlel Wheels 118, 118disV posed to operate in theV lateral direction, as illustrated in Fig. 7 of the drawingsl When called u on to turn the dredging machine by the emp oyment of the small paddlewheels 118, 118, the propeller is arrested, when, by means of suitable elutch, the shafts 117, 117 -are rotated to give the roper rotary movement to the said paddle wlieels 118, 118. In this manner, and by reason of the adjustment of the paddles of the wheels, the driving impulse 1s lateral with regard to the extension ofthe'machine andV the normal path followed thereby. It is obvious that theevo-I lutions' performedby a boat thus equipped, foreign substances and oysters to different and by the mani ulation of the propeller destinations; and a system of holding bins 115 and the latera l disposed paddle wheels to receive the material `from said conveyers. 1 18, may be mani old. l 4. `An oyster dredging and manipulating In Figs. 10 and ,11 of the y. drawings is machinecomprising a boat hull; an elevator 70 Ashown in detail, andv on an enlarged scale, pivotall mounted onand sus ended from the method of mounting the short conveysaid hul; a collecting device or delivering ers forming a series for distributing the to-the said elevator; a mechanism for-sepadebris and foes into the bin 141 AV chute` rating the oysters;"conveyers for delivering 1Q 177 shown therein is pivotally mbuntedf'rat foreign substances and oysters to different 75' 178, and is provided with one or more elondestinations; a` system of holding bins to gated hooks 179, adapted to ovcrreach and receive the` materialrom `saidl conveyers; engage pins 180 set out from the side rails and a plurality of conveyers to deliver the of the runway and framing for the conmaterial from said bins. l veyers. `When the chute 177 is disposed, as 5. An'oyste'r dredging and manipulating 80 illustrated in4 Fig. 10, wherein the hooks machine comprising a boat hull; an elevav 179 engage thepins 180 in supported relator pivotally mounted on and suspended tion, the material received from the conveyfrom said h ull; a collecting device for deers upon the said chute is delivered upon the livering to the said elevator; a mechanism next succeedingconveyer to be thereby carfor separating the oysters; a system of belt 85 ried forward in the direction indicated by conveyers for delivering thel selectedarticle the arrow. When the chute 177 is thus arto the operating tables; and a system of belt ranged, the chute 181 illustrated in dotted conveyers for delivering the refuse from'the lines in the said figures, is removed. The said tables-to the dumps-provided therefor. i .f phute 181 is adjustable on the .frame mount- 6. An oyster dredging and manipulating 90 ing the short conveyers, and m y be lifted machine comprising aboat hull; an elevator therefrom. When, however, it` is desired pivotally mounted on and suspended from that the distribution from any one of the said hull; a collecting device for delivering short conveyers shall occur at the deliver to the said elevator; afmechanism for sepaend of the said conveyer., then the chute 17 rating the oysters; a system of belt con- 96 is Adropped to a vertical position, `while the veyers for delivering the selected article to chute 181 is placed. in the position shown in the operating tables; and a system of belt dotted lines in said Figs. 10 and'11. The conveyers to deliver the shells to the oystery delivery end ofgthe chute'181 is extended beds. i

over the bins 141, or other bins provided, as 7.` An oyster dredging and manipulating 100 for instance, in the shop wherein the shuck` machine embodying a transfer systemy coming or cleaning and sorting above4r described prismg a dredging elevator pivotally mount'- is` carried on.` Y ed in the frame of said machine and exy Having thus described my invention', what tended forwardly therefrom; a system of 40 I claim .as new and desire to secure by Let'- endless belt conveyers extended from the de 105 ters Patent is: livery end of said-elevator beyond the rear 1. An oyster dredgin and manipulating of the'said machine to deliver the oysters machine, comprising a` oat hull; an eleva` raised bythe said elevator from the bed tor pivotally mounted jon and suspended/ back tothe bed, embodying a sorting sect-ion from said hull; a collecting device fordelivfor inspection and removal of refuse or foes 110` ering to the said elevator; a mechanism for `from said oysters while in transit. se arating the oysters; and conveyers for 8..An oyster dredging and manipulating de ivering the separated oysters and refuse machine embodying a transfer systemcomto different destinations. prising a vdredging elevator pivotally mount. f 2. An oyster dredging and manipulating ed in the frame of said machine and ex: 115 `machine Vcomprising a boat-hull; an elevatended forwardly therefrom; a system of tor pivotally mounted on` and suspended endless belt conveyers extended' from the defrom said hull; a collecting device for delivlivery end of said elevator beyond the rear ering to the said elevator; a mechanism for ofthe said machine yto deliver the oysters 55 separating Ithe oysters; and a system ofex- .raised by the said elevator from thebed 12Q` posed conveyersdis osed on said hull to 'deback to the bed, embodying a sorting section liver therefrom an adapted to permit the for inspection and removal of refuse or foes manual extraction of foreign substances carfrom said oysters whlle 1n"'trans1t; a mej, ried by said conveyers'. l chanical sorting device interposed between 6.0 An oyster dredging` and manipulating the said elevator and del1veryconveyers for 125 I machine comprising a boat hull; an elevator .mechanically separatlng the oysters; anda` pivotally mounted on and suspended from system of conveyer belts 'for delivering the said hull; a collecting device for delivering said debris and foes t o holdlngreceptacles. to the said elevator; a mechanism for sepa- 9. An oyster d redglng and manipulating rating the/oysters; conveyers for delivermg machine embodying a transfer system com- 180 prising a dredging elevator pivotally mounta receiving bin extended below the delivery ed in the frame of said 'machine and exend of said system independently oated and tended forwardly therefrom; a system of detachable from said machine. endless belt conveyers extended from the de- In testimony whereof I have signed lthis 5 livery end ofsaid elevator beyond the rear specification in the presence of two subscribf 15 of the said machine todeliver the oysters ing witnesses. raised by the said elevator from the bed NELS A. LYBECK. back to the bed, embodying a'sorting section Witnesses: v

- for inspection and removal of refuse and E. F. MURDOCK,

10 foes from said oysters while in transit; and PriILIr D.y RoLLHAUs. 

